Follow the lead past the form
Imagine two campaigns with the same $4,000 budget. The first brings in 100 leads and two customers. The second brings in 50 leads and five customers. This is a worked example, but the choice it illustrates is useful: $40 leads can cost more to turn into customers than $80 leads.
The advertising cost per customer is $2,000 for the first campaign and $800 for the second. If your report stops at the enquiry, it points you towards the wrong campaign.
Agree on what a useful enquiry looks like
Before changing a bid or rewriting an ad, define a qualified lead with the people handling sales. For a hotel, it might be a booking enquiry for dates with availability. For a software company, it might be a buyer with a relevant use case and a realistic purchasing timeline.
Then connect the campaign record to that outcome. Keep duplicate enquiries out of the count and allow enough time for a lead to become a customer. Comparing yesterday’s leads with last month’s completed sales will give you a misleading picture.
Make the next budget change a test
A campaign with a lower acquisition cost is worth investigating. It is not a promise that its next dollar will perform as well as its last. Check the value of its customers, the cost of serving them, and whether the business can handle more demand.
Move a limited amount of budget, agree on the evaluation window, and watch what happens to customer acquisition cost and contribution. Keep a record of what else changed. A cheaper lead is only useful if it helps the business earn a customer it actually wants.
Further reading: Google Ads: qualified and converted leads ↗